Das Ich Und Sein Gehirn by Karl Popper

An Argument for Interactionism

This book presents a sustained critique of materialist accounts of consciousness and defends an interactionist dualism in which the non‑physical mind can influence the physical brain; it combines philosophical argument with neurophysiological discussion to reject reductionism, argue for human freedom, and propose a threefold ontology distinguishing physical states, subjective experience, and the objective products of knowledge. The authors examine evidence and thought experiments against behaviorist and identity theories, explore how mental states might causally interact with neural processes, and emphasize the autonomy and irreducibility of the self while considering implications for science and metaphysics.